Two guys are in a locker room when one guy notices the other guy has a cork up his ass.

He says,
"How'd you get a cork up your ass?"

The other guy says,
"I was walking along the beach and I tripped over a lamp. There was a puff of smoke, and then a Genie came oozing out. He said, 'I am a Genie, I can grant you one wish.' And I said, 'No Shit!'"